Improvement in water-pipes



J. F. C; RIDER. Water-Pip'e.

"Patented May 20,1379

' reference marked thereon, which form a part.

,used principally in hydraulic engineering for furnish the trade with a pipe thatxshall posand cheapness; and these qualities are se- JOHN F. G. RIDER, OF SOUTH NEV MARKET, XEY HAMPSHIRE, ASSIGNOR TO HELEN A. RIDER, OF SAME PLACE.

IM PROVE MENT l N WATER-Pl PES.

Specification forming part of Letters Patent No. 2E5AL dated May 20, 1879 application filed October To all whom it may concern:

Be it known that I,"JOHN F. O. RIDER, of South New ilI-arket, in the county of Rockingham and State of New Hampshire, have invented certain new and useful Improvements in Tater-Pipes; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art'to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of of this specification.

This invention relates to that class of pipes the conveyance of water, the object being to sess the qualities of greatstrength, durability,

cured by combining in a certain manner layers of paper or other fibrous material with layers of sheet metal and asphaltum, as will be hereinafter fully described.

In the accompanying drawings, Figure 1 is a transverse section through the pipe, showing the arrangement of the different layers of material from which it is constructed. Fig. 2 shows a longitudinal section of a portion of the pipe on the line .20 w of Fig. 1. Fig, 3 is a section of a portion of the pipe through a tap, showing the manner of its insertion.

In cohstructing these pipes a strip or strips of strong paper or fibrous woven fabric, of such length or lengths as may be required to make the pipe of the desired size, is treated by immersion in fluid asphalt, and is then coiled under pressure around a mandrel .of the same diameter as the base of the intended pipe 'until of sufficient thickness to withstand any pressure to which it is intended the finished pipe shall be subjected.

When the pipe is large, and there would be danger of its losing proper form from outside pressure, a sheet of metal, plain or corrugated, may beinterposed between the layers of the material passing around the pipe in one or more coils, so as to impart to the fabric the required stifl'ness, care being taken to always have one or more layers of thefibrous material and asphalt within, and also without, the sheet:

metal coil, so as to fully protect the latter from oxidation and retain the same in position while the pipe is being manufactured. Then coatthe pipe with a thick layer of asphaltum and it is ready for use.

Referring to the drawings, (t represents the inner lining or coat of asphaltum, a' represent-ing a similar coating which covers and protects the outside of the pipe. I) b are the layers of paper, or equivalent material, which form the body and give strength to the pipe to withstand the internal pressure of fluids. The sheet-metal layer 0 is used, as heretofore stated, for the purpose of enabling the pipe to withstand pressure from without when its size would render such protection necessary.

At different points in the length of the pipe the service-taps'fclmay be inserted. These taps are provided with a flange, d, at their inner end, which has a curvature corresponding to that of the inside of the pipe, and is embedded in the inner layer of asphaltum, which serves as a lining.

A screw-thread is formed upon the outside of the tap, and a nut, e, screwed firmly down upon the outside layer of the pipe, .thus holding the tap securely in place. The screwtln ead upon the tap serves not only as a means of securing it in place, but also to make the connect-ion with the service --pipes, and receives a cap whichcloses the aperture when it is not required for other uses. The endprotectiug rings h may be applied to the pipe,

during the process of manufacture, or after it is otherwise finished. They assist in retainthe pipe in shape and prevent injury in handling; but in pipe of small diameter their use may be dispensed with.

Pipes made of layers of wood and asphaltum have been used, but they have been found objectionable, as the wood possesses strength only in one direction-that is, lengthwise of its fiber-but splits readily when the strain is across it, thus weakening the structure, and making it difficult to insert taps or form other openings in the pipe without serious injury.

Pipes have also been made wholly of layers of sheet metal and asphaltuin; but these are objectionable, as their first cost is great, and

the metal layers, when exposed by the insertiou ofa tap or the accidental removal of a portion of the asphaltum covering, quickly eon-odes and destroys the pipe.

The advantages of my method of construe, tion are that the sheet metal, whenv used, is fully protected, and the paper composing the principal portion of the body is a material of even strength in all directions, with very little elasticity, thus avoiding the danger of stretching under pressure, so as to crack the asphaltum eoverin These pipes will also be found Very useful for the conveyance of compressed air or other fluids. Their lightness, compared with metal pipes of equal strength, render their use in mines and other places where the handling musthe done in a confined space of" great advantage.

Having thus described my invention, '1

claim as new, and desire to secure by Letters Patent, the following:

1'. A pipe composed of coils or layers of paper embedded as asphaltum, and having an interposed layer of sheet metal, substantially as and for the purposes set forth;

2. A pipe composedof layers of paper, or its equivalent, embedded in asphaltum, in combinationwith the end-protector h, as and forthe purpose specified.

In testimony that I claim the foregoing asmy own I hereunto aifix my signature in presence of two witnesses.

- JOHN F. (J. RIDER. Witnesses:

RUFUS SA'NBoRN, ALBERT FI i. 

